Ore-crusher.



No. 69l,|35. Patented Ian. l4, I902.

E. HANNAQ DRE CRUSHER.

(Application filed July 29, 1901.)

(No Model.) 2 Sheets-Sheet I.

. I m n 7 m z 27 1% -C/ yd M No. 69I,|35. Patented Ian. I4,. 1902.

. E. E.-HANNA.

ORE GRUSHER.

(Application filed. July 29, 1901.)

2 Sheets8heet 2,

( 0 Model.)

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ELMER E. HANNA, OF CHICAGO, ILLINOIS, ASSIGNOR TO ALLlS'OI-IALMERS COMPANY, OF JERSEY CITY, NE W JERSEY, A CORPORATION OF NEJV JERSEY.

ORE CRUSHER.

SPECIFICATION forming part of Letters Patent No. 691,135, dated January 14, 1902.

Application filed July 29, 1901. Serial No. 7 7 N model-3 To all whom it may concern:

Be it known that I, ELMERE. HANNA, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,

5 have invented certain new and useful Improvements in Ore-Orushers, of which the following is a specification.

This invention relates to that class of orecrushers known in the artas gyrating crush- IO ers, and particularly to the construction of the frame mechanism which embraces and forms the parts known as the spider and concaves, all of which will be more fully hereinafter set forth.

The principal object of the invention is to provide an ore-crusher of the class referred to with simple, economical, and efficient frame mechanism, and a further object is to provide an ore-crusher of the class described with the spider and crushing-concaves all arranged so as to protect the spider mechanism from the wearing action of the material to be crushed and so that the material to be fed into the crusher will be less liable to arch or bridge over the openings between the arms of the spider, all of which prevents its entering the crushing area between the head and concaves.

The invention consists in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure l is a plan View of a spider constructed in accordance with these improvements looking at it from the top; Fig. 2, a vertical sectional elevation of the upper portion of one form of gyrating crusher constructed in accordance with these improvements, showing the crushing mechanism as it appears with the head and shaft at their lowest or normal position; Fig.

3, a similar view to that of Fig. 2 with the crushing head and shaft raised to its greatest limit and illustrating how the spider mechanism is protected from the wearing action of the material; Fig. 4, a plan View of the spider of the present or old type of crusher; Fig. 5,

a vertical sectional elevation of the upper portion of a crusher constructed in accordance with the older type or that now in general use and with the head and shaft at their lowest or normal position; and Fig. 6, a similar View with the crusher-head raised to its greatest or uppermost limit and showing how the spiderrim is subjected to the wearing action of the crushing material, all of which will be more fully hereinafter explained.

In the above-mentioned drawings I have only shown those parts of the machine which have reference to my improvements and not the lower part of the machine, containing the driving mechanism, which gyrates the main or crushing shaft with its crushing-head, as this is well known and understood by those skilled in the art.

In the present style of construction of these crushers, as shown in Figs. 4:, 5, and 6, there are two marked objections, due to the fact that in the practical operation of these crushers they are fed by cars containing from one cubic yard and upward of large pieces of the material to be reduced and which are dumped into the crusher as rapidly as the machine is capable of reducing the material. The first objection arises from the fact that the material thus dumped into the machine arches or bridges over between the arms and the rim and hub of the spider, thus preventingit from entering the space between the head and concaves, and the second objection lies in the fact that as the head and shaft are raised to compensate for the wear on the lower end of the head and the lower end of the concaves the top of the head projects above the top of the concaves and comes into range with the rim of the spider, thus causing a liability for the head to crush the material being operated upon against the rim of the spider and rapidly destroying the same. As is well known, the crushing head and concaves in these machines are made of chilled iron, hard steel, or of some other substance capable of great resistance to crushing strains and wear and tear from same, while the spider, which has to be machined to fit the other parts of the frame and on account of shrinkage strains, is constructed ofasoftermaterial,whichis easily machinable.

In the machines as at present constructed and as shown in Figs. 4, 5, and 6 it will be seen that the spider consists of a rim portion 16 and a hub portion 15, in which the top of the shaft 13, carrying the crushing-head 14, is journaled, and that the rim and hub of the spider are connected together by a plurality of arms between and through which the ma terial is fed to enter the space between the crushing-head 14: and the concaves12, audit will be further seen that the material fed between the head and concaves must fall perpendicularly through a considerable space before it comes in contact with the head and concaves by which it is to be crushed. It will be further seen that to the lower portion of the main frame 10 is bolted and secured the upper portion of the main frame 11, in which the concaves 12 are held, and that the rim of the spider 16 is also secured within the same at the top by the tapered joint and bolts shown, said rim being directly above the crushingconcaves 12 and within working range of the head when raised, as shown in Fig. 6. I

In my improved construction, as shown in Figs. 1, 2, and 3, it will be noted that I change the shape of the upper portion of the main frame and lower the same, so that the top is practically on a line coincident with the top of the crushing-concaves. This allows of extending the lower end of the spider-arms Z and dropping the rim h, so that the upper portion of the concaves g form an inner protecting-wall to the rim h and arms Z of the spider, and are therefore never in range with the crushing-head f, which is mounted on the shaft e, the first possible point of crushing being a line coincident with the top of the concaves and the point on the head which this line would intersect, according to the position to which the head had been adjusted.

In Figs. 2 and 3 the receiving-hopper of the machine has been shown in two rings or sections so arranged that the inner ring can be removed when it is desirable to remove the spider without disturbing the outer ring or section of the hopper to which the feeding-platforms are usually attached; but it will be understood that a single-section hopper can be used, as shown in Figs. 5 and 6.

It will further be seen by an examination of Figs. 2 and 3 that the inner edge of the feeding-hopper is practically on a plane with the top of the head and concaves and that therefore the material being fed into the openings e enters sidewise instead of perpendicularly, as in the arrangement shown in Figs. 5 and 6, thereby reducing the liability of arching between the arms 1, the hub j, and the rim h of the spider to a minimum. Thespider is seen red to the frame 0 in a tapered joint 7.", by the bolts Z in practically the same manner as shown in Figs. 5 and 6.

It will be understood that the crushingheads 14 and fin each of the figures shown are securely fastened to the main shafts 13 and c and that the concaves 12 and g are made in sections in stave form and held in place by molten zinc run behind and between the edges of same.

I claim- 1. In a rock and ore breaker of the class described, the combination of a main frame portion provided with a recess in its upper inner surface, crushing-concaves in such frame portion, the upper ends extending above the base of the recess to form the same into a groove, and a spider portion provided Witha base portion resting in such groove and secured therein, substantially as described.

2. In a rock and ore breaker of the class described, the combination of a main frame portion provided with an annular flange at the upper part thereof forming a portion of an annular groove in its upper inner surface, crushing-con'caves secured to the inner side of such frame and extending upward to form the other walled portion of said annular groove, and a spider portion provided with a circular base secured in such annula r groove, substantially as described.

ELMER E. HANNA.

Witnesses:

PHILETUS W. GATES, A. J. GALEs. 

